Lathe-chuck.



' PATENTEDIAUIG 1, 1905. v

110.796.1 77. G.F.BEAN.

' LATHE CHUCK.

' V APPLIOATI OH FILED OUT. 24. 1904.

"III/[7777M i Y UNITED- STATES PATENT oEEIo-E.

GEORGE F. BEAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR OF ONE- HALF TOHOWARD E. WHITING, OF NEW HAVEN, CONNECTICUT.

LATHE-CHUCK- Specification of Letters Patent.

Patented. Aug. 1, 1905.

To all whom. it may concern:

Be it known that I, GEORGE F. BEAN, a citi-' zen of the United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented-a new and useful Improvement in Lathe-Chucks;and I do hereby declare the following, when taken in connection with theaccompanying drawings and the numerals of reference marked thereon, tobe a full, clear, and exact descriptionof the same, and which saiddrawings constitute part of this specification, and represent, in

Figure 1 a view, partly in side elevation and partly in section, of achuck constructed in accordance with my invention; 'Fig. 2, a brokenview,,in inside elevation, of a portion of the rear member of thechuck-body, showing the adjusting-plug employed for radially moving oneof the jaw-adjusting screws from which the jaw has been, detached; Fig.3, a detached broken view of the outer end of one of thejaw-adjustingscrews, a portion of which is broken away to show its spline or key;Fig.

, 4, a detached plan view of one of the bevelpinions; Fig. 5, a detachedplan view of one erence to having its jaws independently adjusted incase they get out of truth.

With these ends in View my invention consists in a lathe-chuck havingcertain details of construction and combinations of parts, as will behereinafter described, and particularly recited in the claims.

In carrying out my invention I form the jaw-adjusting screw 2 of each ofthe chuckjaws 3 with a spline or key 4, entering a corresponding groove5, leading out of the central hole 6, formed in the beveled pinion? forthe passage through the same of the screw. Under this construction thescrew and pinion are coupled together, so that the pinion will turn withthe screw in either direction without, however, interfering with theradial movement of the screw with respect to the pinion within thelimits of the length of the spline 4, which should be made long enoughto cover the utmost adjustment that will ever be called upon to bringthe jaws into truth. Each screw 2 is also provided with acoupling-flange 8, located near the outer end of the feather 4 andadapted to be entered into a recess 9 in the inner face of aperipherallythreaded disk-shaped adjusting-plug 10, the

outer face of which is also formed with a re-' cess 11 for the receptionof a coupling-nut 12, applied to screw-threads 13, formed at the base ofthe squared outer end 14 of the screw 2, to which, as shown, the nut 12is locked by means of a pin 15.' The adjusting-plug 10 is located in athreaded plug-recess 16, formed in the periphery of the chuck-body,which comprises, as usual, an outer part 17 and an inner part 18. Aset-screw 19, mounted in the part- 18 of the chuck-body, coacts with athreaded block 20 in locking the plug 10 against rotation. The outerface of the plug 10 is formed with radial grooves 21. for the receptionof a spanner-wrench whereby the plug is turned in one directionor theother. The pinions 7 are located in suitable pinion recesses or chambers22 in the chuck-body and all mesh into an annular universal rack 23,housed within the rear part 18 of the chuckbody in the usual manner, theouter and inner walls of the said recesses holding the pinions againstradial movementoutward or inward. The said pinion-recesses 22 arelocated in line with the plug-recesses 16, the

former being located within the latter, as clearly shown. The inner endsof all of the adjusting-screws 2 are threaded, as usual, for

passing through the inner ends of the jaws 3.

It will be understood from the foregoing that when any one of the screws2 is turned by the application of a wrench or key to its squared outerend 14 it will turn its pinion, which will move the annular rack so astocorrespondingly turn the other pinions and correspondingly move theother jaws. This is the universal. feature of the chuck. When any onejaw is moved, all of the other jaws are moved to the same extent. Nowsuppose one of the jaws is not true with relation to one or more of itsfellows. The set-screw 19 of the particular jaw to be trued up will beunscrewed, so as to release the adjusting-plug 10 of the jaw inquestion. Aspanner-wrench is now applied to the adjusting-plug and thesame turned inward or outward, as required, whereby the adjusting-screw2 will be moved radially inward or outward, so asto correspondingly moveits jaw, without, however, disturbing its beveled pinion 7 or thebeveled pinions 7 of the other jaws. Then after the jaw has been truedup the setscrew 19 is screwed in, so as to again bind the adjustingplug10.

It is apparent that in carrying out my invention some changes from theconstruction herein shown and described may be made. I would thereforehave it understood that I do not limit myself thereto, but hold myselfat liberty to make such departures therefrom as fairly fall within thespirit and scope of my invention.

Havingfully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

respective screws with the complementary adjusting-plugs, whereby byturning the said plugs, the said screws may be radially adjustedindependently of each other.

2. In a universal lathe-chuck, the combination with a chuck-body havingpinion -re cesses and plug-recesses located in line with each other, ofradially-uiovahle jaws, pinions for the respective jaws located in thesaid pinion-recesses in which they are held against movement outward orinward, a universal rack engaged by all of the said pinions,adjusting-screws passing through the respective pinions with which theyare coupled for retation but through which the, are radially movable,adjusting-plugs respectively located in the said plug-recesses andexternally threaded for taking into the threads thereof, fixedcoupling-flanges located upon the screws and coacting with the innerfaces of the said plugs, and couplingwashers reinovably mounted upon thescrews and coacting with the outer faces of the said plugs.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

GEORGE F. BEAN.

Witnesses:

HENRY E. W HITING, GEORGE D. SEYMOUR.

